SU737372A1 - Device for mollifying and tempering sheet glass - Google Patents

Description

(54) DEVICE FOR POLYPLEING AND HARDENING OF SHEET GLASS

one

The invention relates to the construction of materials, in particular to the equipment of the factories of the glass industry.

Horizontal electric resistance furnaces are known, the inner surface of the working chamber of which is usually laid out of shaped chamotte or refractory ceramic plates with slots for laying and fixing heating elements, and if the roof of such furnaces is laid out of different configurations of refractories, the hearth plates have a uniform shape. The arch of such furnaces has an arched structure, which implies the presence of lateral compressive forces, provided by special devices that tighten the shaped refractories of the roof and thus preserve the arch shape of the arch 1.

However, the oven described above has a number of disadvantages associated with the design of the ceiling and hearth. So, for example, the implementation of the arch by a similar method requires the use of a certain number of shaped refractories of complex configuration — different

Dfugu from another form and size, This greatly complicates the assembly of the arch, as well as its work in conditions of high temperatures, Frequent removal of the furnace (according to the technology) leads to low density of refractories, with. in this they are compressed, as a result of which the lateral compressive force on the arch increases. With new heating furnace

10, this force is reduced, and by a strictly defined amount, which is impossible to determine, since there are no rehodits for this device, therefore, the arch of the arch of the product is worn out arbitrarily, which does not provide the necessary force. All this leads to the destruction of shaped refractories. In this case, the lower part of the refractory materials undergoes the greatest destruction;

20 having grooves for electric heaters and experiencing in addition to lateral compression a considerable thermal load. As a result, there is a clogging of individual

25 VIGKOVEL & nd 1RG GG5 re1 RHTYE LEY and

gohnie, ..It - Similar events occur

also in the similar devices, it is very often observed

Claims (2)

- a gugoboy of a very heated layer of OGNR jynopHoro material located between the turns. The closest to the proposed invention are horizontal single-chamber ppc billing made in the form of a metal frame, inside of which there is a working chamber assembled from refractory chamotte plates with grooves for accommodating loadings. The space between the working chamber and the frame is filled with thermal insulation material. Such a body is made suspended, and the suspension is carried out by means of metal rods fixing the refractory plates fixed to the heat of the insulation. The furnaces are also laid out from standardized refractory plates provided with slots for electric heaters. 2. However, these furnaces also possess a number of flaws. Due to the fact that the refractory plates are attached to the heat insulator 5Cn6 to thermal insulation, they are replaced. y) And the destruction and change of electric heater is heavily impacted. The method of weighing the plates in the described furnaces leads to the fact that the destruction of the unified refractory plates occurs in places where they pass through the core rods of the suspension, burn out and weld the rods of the suspension rods bearing the BG & stop plates In these devices, breakdown occurs o-gneupora, found mazhda Separate turns of electric heaters. All this leads to a reduction in the operating time between repairs of known Furnaces. The purpose of the invention is an increase in the service life of the device. The goal is achieved in that the device for tin casting and tempering of sheet glass, including a metal frame, thermal insulation, working chamber with sod and hearth, electric heaters-, glass mold, arch made out of Refractory plates located on T-shaped guides and installed with the possibility of their extension and iodine with holes into which the metal mesh of the TrTx: n7 is inserted ceramic-sheathed. In this case, the refractory plates are provided with at least two stiffeners H of FIG. 1; the schematic of the proposed ycTpoitcf ba7 flared cut is shown; Fig. 2 shows a shaped refractory plate, general view: A device for modeling: the sheet glass rolls contain the outer casing 1 of sheet glands and the thermal insulation 2 of refractory brick, in the upper part of which there are metal sheets 3, connected by means of suspension systems 4 with pipes 5, on which iron sheets 6 are laid, supporting thermal insulation. Suspensions 7 are fastened to the pipe 5, to the ends of which are attached perpendicular to it, the shelves 8 which constitute the T-shaped guides. On these guides there are installed shaped refractory plates of 9 unified design, including two stiffening ribs 10, holes 11 for electric heaters. and openings 12 for terminals of the ends of the heaters. The device also contains I, side refractories 13 and bottom refractories 14, through which glass 15 is fed to the carriage 16 on the carriage 16 for heating. Bottom refractories 14 named after holes 17, in which metal rods 18 are inserted, protected by a ceramic sheath 19. The device works as follows. . When inclusions of electric heaters located in the pits 11 of refractory shaped plates 9, the latter are heated and expanded. With this suspension system, iodine expansion does not lead to the destruction of shaped plates, since it is absorbed by the gaps existing between suspensions 7 and shaped plates 9. Backed by shelves 8, shaped plates 9 are easily extended to change, for example, electric heaters, the suspension system itself ensures that high reliability in operation due to the minimum number of welding points and the overall method of fastening suspensions 7k to pipes 5. In the same way, pipes 3 and pipes 5 are connected by means of suspensions 4. Longer The operation of shaped refractory plates 9 is also facilitated by the presence in the last two ribs 10 of stiffness that are not in contact with the pipe 5 and the suspensions 7. Heating the bottom surface of the glass sheet 15, supplied by the furnace using a tube 16, is provided by electric hearth heaters 18 , for: fastened in the openings of 17 floors, refractories and protected by ceramic shells 19. These shells have high dielectric properties, which change little when exposed to temperature. The rods 18 are located along the same line in the horizontal plane at a distance of 15-20 cm from each other. In between, the dielectric atmosphere is the atmosphere of the furnace. All this virtually eliminates the closure of the turns of the electric heaters, between themselves. After bending glass sheets. enters the quenching position. Claims 1. Device for bending and tempering flat glass, comprising